M21.17 - Varus deformity, not elsewhere classified, ankle

Version 2023
ICD-10:M21.17
Short Description:Varus deformity, not elsewhere classified, ankle
Long Description:Varus deformity, not elsewhere classified, ankle
Status: Not Valid for Submission
Version:ICD-10-CM 2023
Code Classification:
  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Other joint disorders (M20-M25)
      • Other acquired deformities of limbs (M21)

M21.17 is a non-specific and non-billable ICD-10 code code, consider using a code with a higher level of specificity for a diagnosis of varus deformity, not elsewhere classified, ankle. The code is not specific and is NOT valid for the year 2023 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding for Varus deformity, not elsewhere classified, ankle

Non-specific codes like M21.17 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for varus deformity, not elsewhere classified, ankle:

  • BILLABLE CODE - Use M21.171 for Varus deformity, not elsewhere classified, right ankle
  • BILLABLE CODE - Use M21.172 for Varus deformity, not elsewhere classified, left ankle
  • BILLABLE CODE - Use M21.179 for Varus deformity, not elsewhere classified, unspecified ankle

Index to Diseases and Injuries References

The Index to Diseases and Injuries is an alphabetical listing of medical terms, with each term mapped to one or more ICD-10 code(s). The following references for this diagnosis code are found in the injuries and diseases index:

Patient Education


Ankle Injuries and Disorders

Your ankle bone and the ends of your two lower leg bones make up the ankle joint. Your ligaments, which connect bones to one another, stabilize and support it. Your muscles and tendons move it.

The most common ankle problems are sprains and fractures (broken bones). A sprain is an injury to the ligaments. It may take a few weeks to many months to heal completely. A fracture is a break in a bone. You can also injure other parts of the ankle such as tendons, which join muscles to bone, and cartilage, which cushions your joints. Ankle sprains and fractures are common sports injuries.


[Learn More in MedlinePlus]

Code History